Never let him pull, he is young and is going to try it on, purse your techniques and never give in to him pulling you where he wants, yes, change directions constantly, if he pulls stop give him a quick tug tug on the lead, say no or his name then when he comes back then start again, works well to change direction so then they do not predict where they are going.......chatting is good, I tell the dogs where I am going, either things like right or left or stopping here, they learn very very quickly!!
Oh and ours empty the logs basket, they think they are helping, would be great for kindling makers!!!!